Yumeshokunin Co., Ltd.’s Misoka toothbrush is designed to conserve water, requiring only a cup of water per brushing session. Equipped with bristles covered with nano-sized minerals designed by the company, the toothbrush has sold 3 million units. Yumeshokunin will put the toothbrush on display at its exhibit at the 2016 Maison & Objet Paris trade show.